OS X: fix wxFileDialog::SetupExtraControls()'s sandbox test.

OS X 10.9 (possibly earlier) don't have nil contentView in NSSavePanel
anymore, a NSRemoteView instance is used. The wx code that follows this
test still crashes under sandbox, though, so update the check to use the
APP_SANDBOX_CONTAINER_ID environment variable, which is only set when
running under the sandbox.

This is just another quick fix for the existing uncomfortably long-lived
sandbox crash hotfix, not a proper solution.

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@76206 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775
Don't emit wxEVT_TEXT in wxMSW's wxTextCtrl::SetFont().

Native text control sends EN_CHANGE when the font changes, producing a
wxEVT_TEXT event as if the user changed the value. This is not the case,
so supress the event.

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@76210 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775